Cons: Will only work on 1x chainring set ups

25% polyurethane

How many tools: 3

Hot Tip: If the GoPro mount seems slightly loose after hand tightening

these are pretty thin grips with a 30

absoluteBLACK 4 Bolt Narrow Wide Chainring - 64 BCD - Oval - Black - 9-12 Speed - 28T Envelope Shipping Cons: Will only work onabsoluteBLACK is dedicated to producing the world's finest oval chainrings and were the first to crack the code to discover the correct shape and 'clocking' to make an oval chainring work. They learned how to maximize the part of the stroke where power is produced and minimize resistance where it isn't which has the effect of smoothing out the delivery of power throughout the pedal stroke and improving efficiency. Many other brands have followed suit